package privilege

import (
	"encoding/json"
	"github.com/gofiber/fiber/v2"
	"penahub.gitlab.yandexcloud.net/backend/penahub_common/privilege/config"
)

type Handler struct {
	serviceName  string
	url          string
	arrPrivilege []config.Privilege
}

func NewPrivilegeHandler(serviceName string, url string, arrPrivilege []config.Privilege) *Handler {
	return &Handler{
		serviceName:  serviceName,
		url:          url,
		arrPrivilege: arrPrivilege,
	}
}

func (handler *Handler) GetPrivilege(c *fiber.Ctx) error {
	agent := fiber.Get(handler.url)
	statusCode, body, errs := agent.Bytes()
	if len(errs) > 0 {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"errs": errs,
		})
	}

	var privileges []config.Privilege
	err := json.Unmarshal(body, &privileges)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"err": err,
		})
	}

	return c.Status(statusCode).JSON(privileges)
}

func (handler *Handler) PostPrivilege(c *fiber.Ctx) error {
	agent := fiber.Post(handler.url).JSON(handler.arrPrivilege)
	statusCode, _, errs := agent.Bytes()

	if len(errs) > 0 {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"errs": errs,
		})
	}

	return c.SendStatus(statusCode)
}

func ComparePrivileges(existing []config.Privilege, incoming []config.Privilege) []config.Privilege {
	existingMap := make(map[string]config.Privilege)
	result := make([]config.Privilege, 0)
	for _, privilege := range existing {
		existingMap[privilege.ID] = privilege
	}

	for _, privilege := range incoming {
		if _, found := existingMap[privilege.ID]; !found {
			result = append(existing, existingMap[privilege.ID])
		}
	}

	return result
}